funder-graph › Recipients
Who funds Mammoth Site of Hot Springs South Dakota Inc
EIN 46-0337824 · Hot Springs, SD · NTEE A560
Mammoth Site of Hot Springs South Dakota Inc of Hot Springs, SD (EIN 46-0337824) was named as a grant recipient by 11 funders in 26 grants paid totaling $657,777 in tax years 2018–2024, as reported on the funders' Forms 990-PF and 990 Schedule I. Each edge was resolved to this EIN at the match tier shown. Dataset version 2026.09.0, built 2026-09-03.
Grants received
$657,777
26 grants paid
Funders
11
distinct grantmakers
Tax years
2018–2024
as reported by funders
Funders
| Funder | State | Match | Grants | Total paid | Latest year |
|---|---|---|---|---|---|
| David B Jones Foundation 41-1909574 | DE | B | 3 | $412,500 | 2024 |
| Black Hills Area Community Foundation 36-3608635 | SD | A | 5 | $149,150 | 2024 |
| South Dakota Community Foundation 46-0398115 | SD | A | 2 | $27,000 | 2023 |
| Bnsf Railway Foundation 26-1635887 | TX | BC | 2 | $20,000 | 2022 |
| Greater Houston Community Foundation 23-7160400 | TX | A | 2 | $18,000 | 2020 |
| Adams Mastrovich Fam Fdn 41-6014092 | MO | C | 1 | $15,000 | 2024 |
| Mary Chilton Dar Foundation 36-3332949 | SD | D | 1 | $7,500 | 2023 |
| Network for Good 68-0480736 | DC | A | 1 | $5,930 | 2020 |
| Jean R D Hecht & Betty Rae Hecht Charitable Foundation 22-2528442 | NJ | D | 5 | $2,000 | 2024 |
| Amazonsmile Foundation 46-2626883 | WA | B | 3 | $572 | 2023 |
| First Interstate Bancsystem Foundation Inc 81-0465899 | MT | D | 1 | $125 | 2020 |
Match tier: A Reported EIN · B Exact name and place · C Strong name match · D Probable name match · U Unresolved. Tiers C and D are inferred, not reported; see how matching works.
Grants
The 26 most recent grants naming this organization.
| Tax year | Funder | Recipient | Match | Amount | Type | Purpose | Source filing |
|---|---|---|---|---|---|---|---|
| 2024 | David B Jones Foundation | Mammoth Site of Hot Springs South Dakota Inc Hot Springs, SD | B | $202,500 | paid | Mammoth Site Intern Program | 202503189349102425 |
| 2024 | Adams Mastrovich Fam Fdn | The Mammoth Site of Hot Springs Sd Hot Springs, SD | C | $15,000 | paid | GENERAL OPERATING | 202513109349100811 |
| 2024 | Black Hills Area Community Foundation | Mammoth Site of Hot Springs Hot Springs, SD | A | $8,000 | paid | COMMUNITY WELFARE | 202502379349301370 |
| 2024 | Jean R D Hecht & Betty Rae Hecht Charitable Foundation | Mammoth Site of Hot Springs Hot Springs, SD | D | $400 | paid | TO CARRY OUT CHARITABLE PURPOSE OF THE FOUNDATION | 202542129349101209 |
| 2023 | Black Hills Area Community Foundation | Mammoth Site of Hot Springs Hot Springs, SD | A | $38,500 | paid | COMMUNITY WELFARE | 202403199349310055 |
| 2023 | South Dakota Community Foundation | Mammoth Site of Hot Springs South Dakota Inc Hot Springs, SD | A | $16,000 | paid | Community welfare and betterment | 202442899349301729 |
| 2023 | Mary Chilton Dar Foundation | The Mammoth Sitehot Springs Hot Springs, SD | D | $7,500 | paid | 202520349349300537 | |
| 2023 | Jean R D Hecht & Betty Rae Hecht Charitable Foundation | Mammoth Site of Hot Springs Hot Springs, SD | D | $400 | paid | TO CARRY OUT CHARITABLE PURPOSE OF THE FOUNDATION | 202442899349100429 |
| 2023 | Amazonsmile Foundation | The Mammoth Site of Hot Springs South Dakota Inc Hot Springs, SD | B | $158 | paid | GENERAL SUPPORT | 202540919349100629 |
| 2022 | David B Jones Foundation | Mammoth Site of Hot Springs South Dakota Inc Hot Springs, SD | B | $130,000 | paid | Enhancing the Paleontology Internship Scholarship program | 202313189349105896 |
| 2022 | Black Hills Area Community Foundation | Mammoth Site of Hot Springs Hot Springs, SD | A | $19,650 | paid | COMMUNITY WELFARE | 202312439349301466 |
| 2022 | Bnsf Railway Foundation | The Mammoth Site of Hot Springs South Dakota Inc Hot Springs, SD | B | $10,000 | paid | CULTURAL | 202321329349103032 |
| 2022 | Jean R D Hecht & Betty Rae Hecht Charitable Foundation | Mammoth Site of Hot Springs Hot Springs, SD | D | $400 | paid | TO CARRY OUT CHARITABLE PURPOSE OF THE FOUNDATION | 202311879349100606 |
| 2022 | Amazonsmile Foundation | The Mammoth Site of Hot Springs South Dakota Inc Hot Springs, SD | B | $246 | paid | GENERAL SUPPORT | 202313119349100141 |
| 2021 | Bnsf Railway Foundation | The Mammoth Site of Hot Springs South Dakota Inc Hot Springs, SD | C | $10,000 | paid | CULTURAL | 202211309349103991 |
| 2021 | Jean R D Hecht & Betty Rae Hecht Charitable Foundation | Mammoth Site of Hot Springs Hot Springs, SD | D | $400 | paid | TO CARRY OUT CHARITABLE PURPOSE OF THE FOUNDATION | 202212099349100011 |
| 2020 | David B Jones Foundation | Mammoth Site of Hot Springs South Dakota Inc Hot Springs, SD | B | $80,000 | paid | Expanding the Paleontology Internship Scholarship fund | 202143139349101409 |
| 2020 | Black Hills Area Community Foundation | Mammoth Site of Hot Springs Hot Springs, SD | A | $30,000 | paid | COMMUNITY WELFARE | 202102519349300935 |
| 2020 | South Dakota Community Foundation | The Mammoth Site of Hot Springs South Dakota Inc Hot Springs, SD | A | $11,000 | paid | Historical education | 202133169349303923 |
| 2020 | Greater Houston Community Foundation | Mammoth Site of Hot Springs South Dakota Inc Hot Springs, SD | A | $10,000 | paid | For the geological study of the sink hole at the Mammoth site. | 202133199349306838 |
| 2020 | Network for Good | The Mammoth Site of Hot Springs South Dakota Inc Hot Springs, SD | A | $5,930 | paid | Unrestricted | 202131819349300608 |
| 2020 | Jean R D Hecht & Betty Rae Hecht Charitable Foundation | Mammoth Site of Hot Springs Hot Springs, SD | D | $400 | paid | TO CARRY OUT CHARITABLE PURPOSE OF THE FOUNDATION | 202121469349100202 |
| 2020 | Amazonsmile Foundation | The Mammoth Site of Hot Springs South Dakota Inc Hot Springs, SD | B | $168 | paid | GENERAL SUPPORT | 202113199349100901 |
| 2020 | First Interstate Bancsystem Foundation Inc | Mammoth Site of Hot Springs Springs, SD | D | $125 | paid | Operational Support | 202102949349100230 |
| 2018 | Black Hills Area Community Foundation | Mammoth Site of Hot Springs Hot Springs, SD | A | $53,000 | paid | COMMUNITY WELFARE | 201912479349300616 |
| 2018 | Greater Houston Community Foundation | Mammoth Site of Hot Springs South Dakota Inc Hot Springs, SD | A | $8,000 | paid | This grant is to help facilitate sedimentology studies of the spring deposits and depositional system. | 201922699349301307 |
Match tier: A Reported EIN · B Exact name and place · C Strong name match · D Probable name match · U Unresolved. Tiers C and D are inferred, not reported; see how matching works.
Recipient matching for this dataset version has not yet completed its independent precision check. Tier A rows carry the EIN the filer reported; tiers B–D are inferred and should be read as leads until the check is published on the methodology page.
Derived from IRS Form 990-PF and Form 990 Schedule I e-file XML filed by the funders shown; this organization's identity from the IRS Exempt Organizations Business Master File. Dataset version 2026.09.0, built 2026-09-03. The rows as Parquet: manifest.
The same organization elsewhere in the program: exempt status and filing health · federal awards · grant guidance · open opportunities.
This is informational only, derived from public data on the dates shown. It is not an eligibility determination, and not legal, tax, or accounting advice. Verify against the official source before relying on it.